建立一个矩阵并求矩阵中所有的马鞍点。在二维数组A[n]中查找马鞍点，根据其特点，在整行整列中要遍历判断，其个数为0至n^2任意数值。-Seeking to establish a matrix and the matrix of all saddle points. In the two-dimensional array A [n] to find the saddle point, according to its characteristics, the entire row to tra